CN101694334B - Prevacuum jet evaporative refrigeration system - Google Patents
Prevacuum jet evaporative refrigeration system Download PDFInfo
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- CN101694334B CN101694334B CN2009102081869A CN200910208186A CN101694334B CN 101694334 B CN101694334 B CN 101694334B CN 2009102081869 A CN2009102081869 A CN 2009102081869A CN 200910208186 A CN200910208186 A CN 200910208186A CN 101694334 B CN101694334 B CN 101694334B
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Abstract
The invention relates to a structure in jet refrigeration. A prevacuum jet evaporative refrigeration system is characterized in that a pipeline above a high-pressure tank (10) is connected to the bottom of an insulating low-pressure tank (4) by a heat exchanger (8) and a circulating pump (7); a liquid inlet pipe of a jet ejector (5) is immerged in the liquid from the upper part of the insulating low-pressure tank (4); the inlet end of the jet ejector (5) is connected to the bottom of the insulating low-pressure tank (4) by a flow rate adjusting valve (6); the inner-upper part of the insulating low-pressure tank (4) is divided into a low-pressure air cavity (3) by a gas-liquid separating membrane; the low-pressure air cavity (3) is connected to an injection inlet of the jet ejector (5) by a pipeline, and another pipeline of the low-pressure air cavity (3) is connected to the bottom of the high-pressure tank (10) by a high-pressure vacuum pump (2); and the high-pressure tank (10) is internally provided with a set of coil tube type cooling system (11). The system has compact volume, adopts zero-pollution environment-friendly medium as a refrigerant, can obtain the temperature below zero, has wide application range, high efficiency, low energy consumption, reliable work, long service life and simple maintenance and can realize continuative energy regulation.
Description
(1) technical field
The present invention relates to Refrigeration Technique, particularly relate to a kind of structure of spray type refrigerating.
(2) background technology
As far back as about 1910, Ma Lisilailanke has proposed vapour injection formula refrigeration system.Though crossed last 100 years, this technical development is slow, and the big efficient of volume is low to be its main cause in marketing of restriction.The present injection cooling device that exists, its principle all are to produce working vapor by boiler, vacuumize in evaporimeter by jet pump to make the heat of operative liquid aqueous vapor absorption another part water obtain cold water.Gas that is sucked and water vapour mix in jet pump behind the diffusion again in the condenser inner condensat liquidization, moisture two-way behind the condensation liquefaction is sent, one the tunnel is sent to evaporimeter as make-up water, another road is sent into the boiler heat cycles again and is produced working steam, in this structure because the existence of boiler, so only be applicable to a kind of medium of pure water, can not obtain sub-zero temperature, device volume is also huger in addition.
Other various vacuum jet refrigeration devices also once appearred in the recent period, principle is similar, but mode is had nothing in common with each other, as " rotating fluid-jet spray pressure charging type cold water preparation method and cooling-water machine ", utilize differential water pressures to pass through discharge of injector self rotary nozzle and pressurization steam inside, seem feasible in theory, but too high to technological requirement, evaporated quantity of water and vacuum are difficult to balance, and practical operation is got up very difficult.
(3) summary of the invention
The objective of the invention is to intend providing a kind of compact conformation to vacuumize jet refrigeration device efficiently, and manipulate easy to maintenancely, lifetime of system is long.
Purpose of the present invention is solved by following technical scheme:
A kind of forevacuum jet sweat cooling system, it is characterized in that: the top of pressure pan is first after heat exchanger by pipeline, circulating pump is connected to the bottom of adiabatic low pressure jar, the feed tube of jet ejectors immerses the liquid from the top of adiabatic low pressure jar, the arrival end of jet ejectors is connected to the bottom of pressure pan through flow control valve, inner and upper at adiabatic low pressure jar is separated out a low pressure air cavity by gas-liquid separation membrane, the low pressure air cavity is connected to the injection inlet of jet ejectors by a pipeline, another root pipe of low pressure air cavity is connected to the bottom of pressure pan through the high pressure vacuum pump, and a cover coiled cooling system is set in the pressure pan.
Further, at described pressure pan between the heat exchanger, at the high pressure vacuum pump to check valve is set respectively between the pressure pan.
Maximum characteristics of the present invention are that jet pump institute work is not to be used for vacuumizing, but the decrease temperature and pressure and promote that the explosive evaporation effect is quickened the latent heat exchange in the low pressure jar of damming.
The technical program forms two sub-circulatory systems, i.e. gas subcycle system and liquid subcycle system by the above configuration.
System utilizes pressure pan and low pressure tank pressure difference to drive jet pump as power by flow control valve, and the gas after gas-liquid separation membrane is separated sprays vaporific liquid gas-liquid mixture to the low pressure jar again in the injection low pressure jar.Obtain cryogenic liquid by the exchange of low pressure gasifying latent heat, be back to pressure pan through circulating pump after the heat exchanger heat exchange again, meanwhile, low pressure jar inner vapor is evacuated in the pressure pan heat release through vavuum pump after gas-liquid separation membrane is separated again and liquefies.Part heat of liquefaction is returned liquid and is absorbed the recirculation of mixing back, outside another part heat of liquefaction discharge system.
Thermodynamic cycle of the present invention as shown in Figure 2.The 0-1 line is that the high pressure pot liquid enters jet pump receiving chamber through jet pump nozzle throttling step-down, 2 is the gas-liquid mixed point of the gas that injection goes out in hydraulic fluid and the low pressure jar, the 2-3 line is to enter the low pressure jar after gas liquid mixture expands through the jet pump diffuser, the 3-5 line is that the partially liq endothermic gasification becomes saturated vapor, the 5-6 line is that the gas after gas-liquid separation is evacuated to pressure pan by vavuum pump and becomes high pressure-temperature gas in the low pressure jar, and the 6-7 line is that the high temperature and high pressure steam heat release is condensed into liquid.0 is through the mixing point that returns liquid and condensed fluid after the heat exchange, the 3-8 line is that the partially liq heat release becomes subcooled liquid, the 8-9 line is that subcooled liquid raises through pressure behind the circulating pump, the 9-10 line is subcooled liquid temperature rising after the heat exchange in heat exchanger, 10 of points are mixed at 0 with 7 of points and enter once more in the jet pump, so circulation.
Superiority of the present invention and beneficial effect are to compare with conventional refrigeration system, have following multiple advantages:
(a) compare with conventional steam jet refrigerating system
1, uses liquid as working fluid, do not need steam boiler, make device volume compact more.Can be applied to the limited field of spatial volume, as marine air conditioning etc.
2, this device is an enclosed circulation, except saline solution, also can adopt other various media as cold-producing medium, can obtain sub-zero temperature, and is applied widely.
(b) compare with vapour compression refrigeration system
1, this device can adopt environmental protection medium that water etc. zero pollutes as cold-producing medium.
2, system does not have big moving component, and it is more reliable to work, and shelf life is longer, safeguards simpler.
3, this device can be realized stepless energy adjustment by flow control valve.
(4) description of drawings
Fig. 1 is a kind of configuration structure schematic diagram of forevacuum jet sweat cooling of the present invention system;
Fig. 2 is thermodynamic cycle figure of the present invention.
Among the figure, the 1st, unidirectional stop valve, the 2nd, high pressure vacuum pump, the 3rd, gas-liquid separation membrane, the 4th, adiabatic low pressure jar, the 5th, jet ejectors, the 6th, flow control valve, the 7th, circulating pump, the 8th, heat exchanger, the 9th, unidirectional stop valve, the 10th, pressure pan, the 11st, cooling system.
(5) specific implementation method
Further describe structure of the present invention below in conjunction with accompanying drawing.
A kind of forevacuum jet sweat cooling system, the top of pressure pan 10 is first after heat exchanger 8 by pipeline, circulating pump 7 is connected to the bottom of adiabatic low pressure jar 4, the feed tube of jet ejectors 5 immerses the liquid from the top of adiabatic low pressure jar 4, the arrival end of jet ejectors 5 is connected to the bottom of pressure pan 10 through flow control valve 6, inner and upper at adiabatic low pressure jar 4 is separated out a low pressure air cavity 3 by gas-liquid separation membrane, low pressure air cavity 3 is connected to the injection inlet of jet ejectors 5 by a pipeline, low pressure air cavity 3 another root pipes are connected to the bottom of pressure pan 10 through high pressure vacuum pump 2, and a cover coiled cooling system 11 is set in the pressure pan 10.
At described pressure pan 10 between the heat exchanger 8, at high pressure vacuum pump 2 to check valve 1 and check valve 9 are set respectively between the pressure pan 10.
As shown in the figure, the liquid of HTHP mixes the vaporific mixture of formation gas-liquid with the gas that comes and is sprayed onto low pressure jar 4 middle and lower parts in low pressure jar 4 behind jet pump 5 step-down jets, produce bubbling boiling effect and quicken gasification latent heat exchange in the low pressure jar 4, efficiently obtain the low temperature liquid cold-producing medium.Low pressure jar external demand is wrapped heat-insulating material.Low-temperature refrigerant is delivered to heat exchanger 8 by circulating pump 7 again and is carried out being back to pressure pan 10 after the heat exchange and mixing with condensed fluid.Meanwhile, the steam of gasification is delivered to pressure pan 10 by high pressure vacuum pump 2 after gas-liquid separation in low pressure jar 4, and through the high steam condensation heat release in low pressure jar 4 after the pump pressurization, a part of heat is returned liquid and absorbs, outside another part heat is exhausted from system.Water after the liquefaction sprays to low pressure jar 4 once more, so finishes circulation.System is by regulating the aperture control refrigerating capacity of flow control valve 6.
The native system volume compact adopts the zero environmental protection medium cold-producing medium that pollutes, and can obtain sub-zero temperature, applied widely, efficient is high, power consumption is low, reliable operation, life-span are long, safeguard simply, can stepless energy adjustment.
Claims (2)
1. forevacuum jet sweat cooling system, it is characterized in that: the top of pressure pan (10) is first after heat exchanger (8) by pipeline, circulating pump (7) is connected to the bottom of adiabatic low pressure jar (4), the feed tube of jet ejectors (5) immerses the liquid from the top of adiabatic low pressure jar (4), the arrival end of jet ejectors (5) is connected to the bottom of pressure pan (10) through flow control valve (6), inner and upper at adiabatic low pressure jar (4) is separated out a low pressure air cavity (3) by gas-liquid separation membrane, low pressure air cavity (3) is connected to the injection inlet of jet ejectors (5) by a pipeline, another root pipe of low pressure air cavity (3) is connected to the bottom of pressure pan (10) through high pressure vacuum pump (2), and a cover coiled cooling system (11) is set in the pressure pan (10).
2. according to the described forevacuum jet of claim 1 sweat cooling system, it is characterized in that between the heat exchanger (8) first check valve (1) being set, between the pressure pan (10) second check valve (9) is set at high pressure vacuum pump (2) at described pressure pan (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102081869A CN101694334B (en) | 2009-10-23 | 2009-10-23 | Prevacuum jet evaporative refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102081869A CN101694334B (en) | 2009-10-23 | 2009-10-23 | Prevacuum jet evaporative refrigeration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101694334A CN101694334A (en) | 2010-04-14 |
| CN101694334B true CN101694334B (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102081869A Expired - Fee Related CN101694334B (en) | 2009-10-23 | 2009-10-23 | Prevacuum jet evaporative refrigeration system |
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| Country | Link |
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| CN (1) | CN101694334B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674615A (en) * | 2016-02-02 | 2016-06-15 | 娄山 | Absorption refrigerator capable of directly absorbing refrigerant vapor |
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- 2009-10-23 CN CN2009102081869A patent/CN101694334B/en not_active Expired - Fee Related
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| CN101694334A (en) | 2010-04-14 |
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Granted publication date: 20110209 Termination date: 20111023 |